Adobe Acrobat

Price: approx. $299 (Standard) and $449 (Professional); also available as part of the Technical Communication Suite

http://www.adobe.com

Nuance PDF Converter Professional

Price: approx. $100

http://www.nuance.com

ABBYY PDF Transformer and ABBYY FineReader

Price: approx. €65 / €139

http://www.abbyy.com

Nitro PDF Professional

Price: approx. $100; Nitro PDF Professional OCR approx. $120

http://www.nitropdf.com

gDoc Fusion

Price: approx. €100

http://www.globalgraphics.com

Amyuni PDF Suite

Price: approx. $99

http://www.amyuni.com

Foxit PDF Creator, Foxit PDF Page Organizer, Foxit PDF Editor

Price: approx. $30, $59, $99

http://www.foxitsoftware.com

PDF Professionell

In German language only.

Price: approx. €36

http://www.databecker.de

PDF Studio for Linux, Mac & Windows

Price: approx. $60

http://www.qoppa.com

PDFCreator

Acts as a printer driver and allows you to create PDF files from any Windows application.

Price: free (Open Source)

http://www.pdfforge.org

PrimoPDF

Allows you to create PDF files from any content you can print.

Price: free (Open Source)

http://www.primopdf.com

Ghostscript and GSView

Can convert PostScript files into PDF, using the ps2pdf tool. The add-on GSView allows you to view both PostScript and PDF files on screen. It also lets you print directly from the viewer or export to bitmap formats.

Price: free (Open Source)

http://pages.cs.wisc.edu/~ghost/

Infix PDF Editor

Price: approx. $99

http://www.iceni.com

CAD-KAS PDF Editor

Price: approx. $79

http://www.cadkas.com

PDFTK Builder

Graphical user interface to the Windows version of the open source tool PDFTK. Allows you to split PDF files and to insert, rearrange and remove pages.

Price: free (Open Source)

http://www.angusj.com/pdftkb/

pdfKorrektor

Inserts proofreader's marks according to the German DUDEN into PDF files. Only available in German.

Price: approx. €295

http://www.pdfkorrektor.de

PDF Accessibility Checker (PAC)

Tests PDF files for accessibility issues.

Price: free (Freeware)

http://www.access-for-all.ch/en/pdf-werkstatt/pac-pdf-accessibility-checker/

Foxit Reader (Freeware, Windows)

Alternative PDF reader. Small size, fast launch speed.

Price: free

http://www.foxitsoftware.com

Nuance PDF Reader

PDF viewer; also allows you to annotate PDF files.

Price: free

http://www.nuance.com

Xpdf

PDF file viewer for Linux. A PDF-to-Postscript converter is also included.

Price: free (Open Source)

http://www.foolabs.com/xpdf/

Okular

Universal document viewer (including PDF and CHM) for KDE.

Price: free (Open Source)

http://okular.kde.org